H46.0.01.6C-04_VWR
Sensor
S
ca
le
NP
Operating and Maintenance Advice
1. In case of low battery voltage "BAT" is displayed; make sure to exchange ba t-
tery immediately as too low an operation voltage may lead to incorrect measur-
ing results. To exchange battery, please proceed as follows:
- push battery cover located at the back side of the device unit downwards.
- take out battery and replace by a new one
- close battery cover
We recommend to take out battery if device will not be operated for some time
or if the device will be storaged about 50°C.
Please note:
If the battery voltage falls even lower the voltage may not be su f-
ficient for "BAT" to be displayed so that there will be no "BAT" indication al-
though the battery has been used up. We recommend to make it a rule to al-
ways check the battery if the values indicated seem to be completely out of
range.
2. Make sure to maintain unit properly and to operate it in accordance with the
specification listed (do not throw, knock etc.).
3. Mains operation:
When using a power supply unit please note that operating voltage has to be
10 to 12 V DC. Do not apply overvoltage! Cheap 12V-power supply units often
have excessive no-load voltage. We, therefore, recommend using regulated
voltage power supply units. Trouble-free operation is guaranteed by our power
supply GNG10/3000. Prior to connecting the plug power supply unit with the
mains supply make sure that the operating voltage stated at the power supply
unit is identical to the mains voltage.
Adjusting
The measuring device will be calibrated before leaving our works. A recalibration
is, therefore, not necessary. If you want to calibrate the device for an existing se n-
sor, please proceed as follows:
1. Zero point adjusting (0°C):
Put ice cubes in a glass and pour cold water until
ice cubes are almost covered. Put sensor into
glass, and stir water. Wait for stable value and
turn zero point potentiometer (NP) by means of a
screw driver until display shows "0.00"
2. Scale adjusting:
For scale adjustment a
known reference temperature is needed. Expose the probe to the reference and
adjust the display using the potentiometer “Scale”
Calibration Service
Calibration certificate - DKD certificate - official certifications:
If the measuring instrument is supposed to receive a calibration certificate, it has
to be sent to the manufacturer. (declare test levels, e.g. 0°C; 70°C)
