H33.0.02.6C-09
Operating Manual GMH 3530
page 3 of 14
3
Operating and Maintenance Advice:
a) When to replace battery:
If
and ´bAt´ are shown in the lower display the battery has been used up and needs to be replaced. The de-
vice will, however, operate correctly for a certain time.
If ´bAt´ is shown in the upper display the voltage is too low to operate the device; the battery has been completely
used up.
Please note: The battery has to be taken out, when storing device above 50°C.
We recommend to take out battery if device is not used for a longer period of time.
b) Treat device and sensor carefully. Use only in accordance with above specification. (do not throw, hit against etc.).
Protect plug and socket from soiling.
c) When connecting the temperature probe the connector may not lock to the jack correctly. In such a case hold the
connector not at the case but at the buckling protection of the cable during the plug in. Don’t connect electrode
canted! If plug is entered correctly, it will slide in smoothly.
To disconnect temperature probe do not pull at the cable but at the plug.
If plug is entered incorrectly the connecting pins of the plug can be damaged. => Plug can no longer be used and
connecting cable needs to be replaced.
d) Mains operation:
When using a power supply device please note that operating voltage has to be 10.5 to 12 V DC.
Do not apply overvoltage!! Cheap 12V-power supply devices often have excessive no-load voltage. We, there-
fore, recommend using regulated voltage power supply devices. Trouble-free operation is guaranteed by our
power supply devices. Trouble-free operation is guaranteed by our power supply, GNG10/3000.
Prior to connecting the plug power supply device with the mains supply make sure that the operating voltage
stated at the power supply device is identical to the mains voltage.
e) Display values for damaged electrode cable or if no pH or redox-electrode has been connected
If no electrode is connected or the connection cable is damaged the display will nevertheless show mV, pH or rH
values. Please note that these values can never be correct measuring results!
4
Safety Requirements:
This device has been designed and tested in accordance with the safety regulations for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety measures and
special safety advises given in this manual will be adhered to when using the device.
1. Trouble-free operation and reliability of the device can only be guaranteed if the device is not subjected to any
other climatic conditions than those stated under "Specification".
2. If the device is transported from a cold to a warm environment condensation may cause in a failure of the func-
tion. In such a case make sure the device temperature has adjusted to the ambient temperature before trying a
new start-up.
3. If device is to be connected to other devices (e.g. via serial interface) the circuitry has to be designed most care-
fully. Internal connection in third party devices (e.g. connection GND and earth) may result in not-permissible vol-
tages impairing or destroying the device or another device connected.
Warning:
If device is operated with a defective mains power supply (short circuit from mains voltage to output
voltage) this may result in hazardous voltages at the device (e.g. sensor socket, serial interface).
4. If there is a risk whatsoever involved in running it, the device has to be switched off immediately and to be
marked accordingly to avoid re-starting.
Operator safety may be a risk if:
- there is visible damage to the device
- the device is not working as specified
- the device has been stored under unsuitable conditions for a longer time.
In case of doubt, please return device to manufacturer for repair or maintenance.
5.
Warning:
Do not use these products as safety or emergency stop devices or in any other application where failure
of the product could result in personal injury or material damage.
Failure to comply with these instructions could result in death or serious injury and material damage.
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