Braun Thermoscan Unit Change
Do Kieu
To change the temperature reading on a Braun ThermoScan from Celsius to Fahrenheit, you need to first ensure the thermometer is off. Then, press and hold down the power button until the display shows either F (Fahrenheit) or C (Celsius). Release the power button when the desired unit is displayed.
We have a Braun Thermoscan infra-red (IR) thermometer that has been working perfectly for about five years. It started complaining about low batteries and shutting off, despite me replacing with new batteries that I checked had plenty of charge.
When I opened it, I discovered that the batteries connect to the circuit board via simple metal clip contacts, and that the contacts had some corrosion on them, which was preventing power from getting to the board, hence why it was complaining of low batteries.
This image above also shows the contact points on the circuit board for the battery connection. This is where some corrosion had formed, and I could remove it simply by scraping lightly with a small screwdriver (the corner of a scourer would also have worked).
Same problem here with the bent contacts for the battery not making contact. Love this thermometer but being an electronics engineer and looking at the circuit board and overall design of how it powers up I agree with the comment that the design is poor for expecting a long term product life.
Our thermoscan had been working well, but I am not 100% sure if it is me or just in daylight (I tried using in a dark room). But the light stays on until the moment it gets a reading and then the backlight turns off immediately. Bit of a pain as that is when you want the backlight on! Anyone had similair problem? Also I put cheap coles batteries into it, but they are brand new, so still should be fine?
Hi Kevin, im having the same battery problem as yours in the same model. Trying to follow your fix, trying my best to open it, but once the screw is out, i dont know how to open it further. Im stuck. Can u pls help. Would love for u to put up a utube video so its easily follow able.
Wow, thanks Kevin, I followed your very helpful instructions and it solved the problem I was having with our 10-year-old Braun thermometer. Your instructions are quite clear and, in my opinion, better than following a YouTube video.
Thank you! You have been great help. Was kind of sad when I just could not get the Thermoscan 6022 to start up after changing batteries. Then I stumbled upon your article, followed your instructions and now it is working again.
Thanks Kevin as I followed your advice and my 6020 seems to be working again. It was saying lo then hi. I changed the batteries and then just got a constant error message or a reading of 41c! I was just about to throw it out when I found your advice. Followed it and it is working and giving realistic reads again. Thanks so much.
If soldering is not possible, then perhaps you could very carefully bend the clips (only a small amount) so that they rest on a slightly different part of the copper pad. Alternatively, kitchen foil could be used to increase the surface area of the clip.
Thank you so much for sharing this. I bought my thermometer in the US (I live in Korea) about 5 years ago and it stopped turning on recently. I thought I was going to have to shell out $100 for a new one here but I found your fix and it worked like a charm. Definitely good to have during this flu/corona virus season!
My approach would be to lightly tin what remains of the tab, and tin some multi-core wire. Then solder the tinned threads to the pad and snip them to leave fresh points of contact. You have to take a lot of care with damaged pads, not to rip them up.
The little red pin is essentially a push-button that should push in easily when the ear protector is attached. If yours is not pressing in, then it must be obstructed somehow. I would first try wiggling it carefully, to see if it could be freed up (tweezers might help).
My Thermoscan was coming up with the POS error all the time and when opened up realised the battery connectors were corroded. Scraped all the corrosion off and tried again but still kept giving the error.
Perioperative hypothermia can develop easily during shoulder arthroscopy, because cold irrigation can directly influence core body temperature. The authors investigated whether active warming and humidification of inspired gases reduces falls in core body temperature and allows redistribution of body heat in patients undergoing arthroscopic shoulder surgery under general anesthesia.
Patients scheduled for arthroscopic shoulder surgery were randomly assigned to receive either room temperature inspired gases using a conventional respiratory circuit (the control group, n = 20) or inspired gases humidified and heated using a humidified and electrically heated circuit (HHC) (the heated group, n = 20).
Core temperatures were significantly lower in both groups from 30 min after anesthesia induction, but were significantly higher in the heated group than in the control group from 75 to 120 min after anesthesia induction.
In this study the use of a humidified and electrically heated circuit did not prevent core temperature falling during arthroscopic shoulder surgery, but it was found to decrease reductions in core temperature from 75 min after anesthesia induction.
Hypothermia after general anesthesia is observed in approximately 60% of patients undergoing surgery [1], and results from a redistribution of body heat, reduced heat production, and a net loss of heat to the environment [2,3]. Furthermore, perioperative hypothermia increases the risks of myocardial ischemia [4], excessive blood loss [5], surgical wound infection, and prolonged hospitalization [6].
Perioperative hypothermia can develop easily during shoulder arthroscopy, because cold irrigation can directly influence core body temperature [7,8]. The uses of warmed irrigation fluid [7] or a forced-air warming blanket [8] have been reported to decrease perioperative hypothermia during arthroscopic shoulder surgery. However, blurring of visual field caused by warmed fluid during arthroscopy is of concern. On the other hand, it was recently reported that active warming and humidification of inspired gases helps maintain core body temperature and reduces blood loss during spine surgery [9], but the efficacy of active warming and the humidification of inspired gases during general anesthesia is debatable. We hypothesized that the use of a humidifier and an electrically heated circuit (HHC) would attenuate decreases in core body temperature during shoulder arthroscopy under general anesthesia. Accordingly, we prospectively evaluated whether the active warming and humidification of inspired gases would reduce decreases in core body temperature and the incidence of intraoperative hypothermia in patients undergoing arthroscopic shoulder surgery under general anesthesia.
All patients were premedicated with intramuscular midazolam 2 mg and glycopyrrolate 0.2 mg 1 h before anesthesia. Anesthesia was induced with intravenous lidocaine 40 mg, propofol 2 mg/kg, and rocuronium 0.6 mg/kg. After intubation, lungs were ventilated at a tidal volume of 8-10 ml/kg at a respiratory rate of 8-12 breaths/min with no external positive end-expiratory pressure, to maintain an end-tidal carbon dioxide concentration of 30-35 mmHg for 50% inspired oxygen at a fresh gas flow rate of 3 L/min. Inspired sevoflurane concentrations were adjusted to maintain a bispectral index (BIS) score between 40 and 55. At 15 min after anesthesia induction, patients were placed in the 70 upright position using a beachchair (Allen Lift-Assist Beach Chair, Allen Medical Systems, Acton, USA). All surgical procedures were performed by one senior surgeon. Hypotension was defined as an MAP of < 60 mm Hg or of < 80% of baseline at 5 min after anesthesia induction in the supine position. Incidences of hypotension were recorded and treated with intravenous ephedrine 5 mg or phenylephrine 50 g, as appropriate.
SPSS 13.0 (SPSS Inc, Chicago, IL, USA) was used for the statistical analyses. Values are expressed as means SD or numbers of patients. Data normality was tested using the Kolmogorov-Smirnov test, and normally distributed continuous variables were compared using the independent t-test or by repeated measures analysis of variance (ANOVA) with Bonferroni's correction. Statistical significance was accepted for P values of < 0.05.
No significant differences were observed between patient characteristics or induction profiles in the control and heated groups (Table 1). The incidences of hypotension in the control and heated groups were 30% (6/20) and 25% (5/20), respectively, which were not significantly different. Seven patients in the control group and 5 patients in the heated group were noted to suffer from shivering in the PACU (Table 1). No patient received a transfusion.
Core temperature was significantly higher in the heated group than in the control group at 75, 90, 105 and 120 min after anesthesia induction. When compared with baseline values, core temperatures in both groups decreased significantly from 30 min after anesthesia induction (Fig. 1). No significant intergroup difference was found between skin surface temperature gradient (GradF-F) values. GradF-F in the heated group increased significantly from 75 min after anesthesia induction versus baseline (Fig. 1).
The changes in mean arterial pressures (MAP) and heart rates (HR) are shown in Fig. 2. MAP and HR were comparable in the two groups during the study period. However, MAP in the control group was significantly lower than baseline at 15 min after induction, and in the heated group was significantly lower at 15 and 30 min after induction.
In this study, we found that the use of a humidified and electrically heated circuit (HHC) reduced falls in core temperature from 75 min after anesthesia induction during arthroscopic shoulder surgery, but that it did not reduce the incidence of intraoperative hypothermia or postoperative shivering.
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