Gossen MetraWatt METRAHit 28C light, Operating Instructions Manual, Page: 22 / 26

22 GOSSEN METRAWATT GMBH
Display
LCD panel (65 mm x 30 mm) with display of up to 3 values,
the respective units of measure and various special functions.
Display / Char. Height
7-segment characters
Main display:
12 mm
Auxiliary displays: 7 mm
Polarity Display “–” sign is displayed in the range
–300 mV
LCD Test All display segments available dur-
ing operation are activated after the
instrument is switched on.
Power Supply
Batteries 3 ea. 1.5 V mignon cell
alkaline manganese per IEC LR6 or
equivalent rechargeable batteries.
If rechargeable batteries are used,
they must be charged externally.
Service Life With alkaline manganese
(2200 mAh)
If voltage drops below 2.7 V, the
instrument is switched off automati-
cally.
Battery Test “ ” is displayed automatically if
battery voltage drops to below
approx. 3.5 V.
Mains Power When mains power pack NA5/600
is connected, the power supply
comes from the mains power pack;
battery power is not consumed;
there is no risk of batteries being
charged.
Fuse Calibrator F3
Position of fuse see chapter 12.3
M125mA/250V, 5 mm x 20 mm
1.5 kA switching capacity at 250 V
AC and ohmic load
Electrical Safety
Safety Class II per EN 61010-1:2001/
VDE 0411-1:2002
Operating Voltage max. 50 V
Contamination Factor 2
Test Voltage 500 V~ per EN 61 010-1:2001/
VDE 0411-1:2002
Electromagnetic Compatibility (EMC)
Interference emission EN 61326: 2002 class B
Interference immunity EN 61326: 2002
IEC 61000-4-2: Feature A:
8 kV atmospheric discharge
4 kV contact discharge
IEC 61000-4-3: Feature B:
3 V/m
Data Interface
Data Transmission optical via infrared light through the
housing
with interface adapter as accessory
Type RS 232C, serial, per DIN 19241
Bidirectional baud rate (read and write)
(MM
↔
PC)
BD232, USB-HIT: 9600 baud
Ambient Conditions
Accuracy Range 0
°
C ... +40
°
C
Operating Temperature
−
10
°
C ... +50
°
C
Storage Temperature
−
25
°
C ... +70
°
C
(without batteries)
Relative Humidity 40% ... 75%,
no condensation allowed
Elevation to 2000 m
Deployment indoors,
outdoors: only in the specified
ambient conditions
Mechanical Design
Dimensions 84 mm x 195 mm x 35 mm
Weight approx. 420 g with batteries
Protection IP 50
Extract from table on the significance of IP codes
Calibration
Function Service Life
mV, thermocouple 48 mA 40 h
15 V 85 mA 20 h
Ω
, RTD 95 mA 18 h
Sink, 20 mA 175 mA 10 h
Source, 20 mA 140 mA 12 h
IP XY
(1
st
digit X)
Protection against
foreign object entry
IP XY
(2
nd
digit Y)
Protection against the
penetration of water
0 not protected 0 not protected
1
≥
50.0 mm
∅
1 vertically falling drops
2
≥
12.5 mm
∅
2 vertically falling drops
with enclosure tilted 15
°
3
≥
2.5 mm
∅
3 spraying water
4
≥
1.0 mm
∅
4 splashing water
5 dust protected 5 water jets