H49.0.02.6C-02
Operating Manual MH 3750
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8 Technical Data
Supported probes
Pt100 4-wire (2-wire possible)
Sensor Curve
according to EN60751
or with user-sensor curve (table of 50 rows and 2 columns: Ohm/°C]
Probe connection
4pole Mini-DIN socket
Resolution
0.01°C respectively 0.1°C, 0.01°F respectively 0.1°F
Measuring Ranges
0.01°C
0.1°C
0.01°F
0.1°F
–199.99... +199.99°C
-200.0... +850.0°C
-199.99... +199.99°F
-328.0... +1562.0°F
Precision
Device without probe ±1Digit (at nominal temperature)
Range 0.01°C/F
Range 0.1°C/F
±0.03°C / 0.06°F
±0.1°C / ±0.2°F
Measuring
4-wire measuring with automatic compensation of thermovoltage errors,
measuring current ca. 0.3mA
Temperature drift
<=0,002K per 1K for Pt100 4-wire
Nominal temperature
25°C
Ambient
Temperature
-
25 ... +50°C (-13 .. 122°F)
rel. humidity 0 ... 95%r.F. (not condensing)
Storage temperature -
25 ... +70°C (-13 ... 158°F)
Housing
Dimensions: 142 x 71 x 26 mm (L x W x D)
impact-resistant ABS plastic housing, membrane keyboard, transparent panel. Front side IP65,integrated
pop-up clip for table top or suspended use.
Weight
approx. 155 g
Output:
3.5mm audio plug, stereo
Selectable as serial interface:
via optically isolated interface adapter GRS3100 or GRS3105 (p.r.t. accessories) directly
connectable to RS232-interfaces.
analogue output:
0..1V, freely scaleable (resolution 13bit, accuracy 0.05% at nominal temperature, cap. load <1nF)
Min/Max-Alarm:
The measuring value is constantly monitored for the min and max rails set. Alarming is done by integrated
horn, display and interface
Real time clock:
Integrated clock with date and year
Logger:
2 Functions: individual value logger („Func–Stor“) and cyclic logger („Func–CYCL“)
Memory:
Stor: 99 data sets; CYCL: 16384 data sets
Cycle time CYCL:
0:01...60:00 (minutes:seconds, min 1s, max 1h)
Power Supply
9V-Battery, type IEC 6F22 (included) as well as additional d.c. connector (diameter of internal pin 1.9 mm)
for external 10.5-12V direct voltage supply. (suitable power supply: GNG10/3000)
Power Consumption
output off
ca. 0.90mA
output serial interface:
ca. 1.15mA
analogue output:
ca. 1.25mA
Display
Two 4 ½ digits LCD’s (12.4mm high and 7 mm high) for temperature, min./ max values, hold function, etc.
as well as additional pointing arrows.
Pushbuttons
6 membrane keys for on/off switch, menu operation, min. and max. value memory, hold-function etc.
Min-/Max-Value Memory
Both the max. and the min. value will be memorised.
Hold Function
Press button to store current value.
Automatic-Off-Function
Device will be automatically switched off if no key is pressed/no interface communication takes place for
the time of the power-off delay. The power-off delay can be set to values between 1 and 120 min.; it can be
completely deactivated.
EMC:
The MH3750 corresponds to the essential protection ratings established in the Regulations of the Council
for the Approximation of Legislation for the member countries regarding electromagnetic compatibility
(89/336/EWG)
EA1 +A2 (Appendix B, class B), additional error: < 1% FS.
SIKA, Dr. Siebert & Kühn GmbH & Co. KG, Struthweg 7-9, 34260 Kaufungen, Germany
Tel: +49-5605-803-0, Fax: +49-5605-803-54, email: [email protected], web: www.SIKA.net
