H49.0.02.6C-04
Operating Manual GMH 3750
Page 3
1.2 Operating And Maintenance
•
Battery Operation
The battery has been used up and needs to be replaced, if
and „bAt“ are shown in lower display.
The device will, however, continue operating correctly for a certain time.
The battery has been completely used up, if ´bAt´ is shown in the upper display.
The battery has to be taken out, when storing device above 50°C.
Hint: We recommend to remove the battery if device is not used for a longer period of time!
•
Mains Operation
Attention:
When using a power supply unit please note that operating voltage has to be 10.5 to 12 V DC. Do not
apply overvoltage!! Simple 12V-power supplies often have excessive no-load voltage. We, therefore, recommend
using regulated voltage power supplies. Trouble-free operation is guaranteed by our power supply GNG10/3000.
Prior to connecting the plug power supply with the mains supply make sure that the operating voltage stated at the
power supply is identical to the mains voltage.
•
Treat device and probes carefully. Use only in accordance with above specification. (do not throw, hit against etc.).
Protect plugs and sockets from soiling.
•
To disconnect sensor plug do not pull at the cable but at the plug.
•
When connecting the probe the plug will slide in smoothly if plug is entered correctly.
•
Selection of Output-Mode
: The output can be used as serial interface or as analogue output. This choice has to
be done in the configuration menu.
1.3 Connections
1.
Output:
Operation as interface: Connect to optically isolated
interface adapter (accessory: GRS 3100 or GRS3105)
Operation as analogue output: Connection via suitable cable.
Attention: The output mode has to be configured (p.r.t. 2.7) and
influences battery life!
2.
Probe connection
Pt100 4-wire
3.
The
mains socket
is located at the left side of the instrument
1.4 Display Elements
1 = Main Display:
Currently measured temperature
2 = Auxiliary
Display:
Display of min, max or hold values
Special display elements:
3 = Warning
triangle:
indicates a low battery
4 = Corr-arrow
:
indicates that correction factor is activated
5 = Offset-arrow
:
indicates that zero point offset (offset) is activated
6 = Min/Max/Hold
:
shows if a min., max. or hold value is displayed in
the secondary display
7 = Alarm-arrow
:
Flashes if alarm is present
8 = Logg-arrow
:
Shown if logger function is selected,
flashes if cyclic logger is running
1.5 Pushbuttons
key 1:
On/Off key
key 4:
Set/Menu
press (Menu) for 2 sec.: configuration will activated
keys 2, 5:
min/max when taking measurements:
press shortly: min. or max. measuring value will be displayed
press for 2 sec.: the min. or max. value will be deleted
up/down for configuration:
to enter values or change settings
key 6:
Store/Quit
- Measurement: Hold current measuring value ('HLD' in display) or
operation of logger functions (p.r.t. Chapter 5)
- Menu: Acknowledge setting, return to measuring
key 3:
When taking measurements
: no function
During configuration
: Selection of menu-parameter
!
