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Molytek 3702 Recorder
Specifications
- Number of Inputs - Up to 32 analog inputs plus the computer I/O
- Any combination of any of the following types of analog inputs can
be selected:
Millivolts and Volts: Any full-scale voltage from +/-1
millivolt to 10 volts can be programmed.
Current: 4 to 20 mA or other current ranges such as 1 to 5 mA
or 10 to 50 mA can be accommodated by simply installing a resistor
across the input terminals.
Thermocouples: Linearization to 0.2°C conformity with NBS
reference monographs plus automatic cold junction compensation are
provided for thermocouple types J, K, T, R, S, E, B, N, Plaintell II,
W/W-26Re. In addition, linearization for special thermocouples such as
Xk, XA, EU-2, LB-3 etc. can be entered by the operator. Cold junction
temperature is continuously monitored and automatically compensated
for in all TIC measurements, but can be disabled for specific channels
when not required.
Resistance Temperature Detectors (RTDs): Linearization is provided
for Pt-1 00, both DIN 43760 (IEC 200385) and Alpha .003923; 120 ohm
Nickel, Edison Electric Institute 120 ohm at 0°C; 10 ohm Copper,
Edison Electric Institute 10 ohm at 0°C; 10 ohm Copper at 25°C. Any
curve, such as PT -50 or JIS 2003916, can be entered by the operator.
Relative Humidity: Relative humidity is calculated using dry
and wet bulb temperatures as variables in a standard Rh algorithm.
User Programmed Linearization: Room for 16 different customer
entered linearizations for applications such as special TICs, RTDs,
thermistors, humidity sensors, gas analyzers, load cells, flow meters,
etc. This linearization may be entered as a look-up table with up to
40 break points, or with a slope/intercept using the equation y = Mx +
b.
- T/C Standardization - One step software routine references up to 31
thermocouples of the same type to within +/-0.15°C. This routine will
solve thermocouple reading inaccuracies due to unmatched T/Cs of the
same type, different sensor lead lengths, or temperature gradients
across the input terminals.
- Scan Cycle Time - All input signals and 2 alarm set points per
channel are scanned every 2 seconds regardless of chart speeds or
datalog intervals.
- Engineering Units - Any three character engineering unit can be
created and assigned to correspond with any scaling factor on any
channel. Units such as GPM, T/D, RPM, MIL, TON, KG, etc. can be
assigned to channels. These units will be included in the computer
output, digital display and printed on the chart when datalogging.
- Scientific Notation - Input values exceeding five digits can be
expressed in scientific notation on the chart, digital displays and
serial output. For example, 0.000061 TOR would be represented as 6.1 X
10-5.
- Programmable Resolution - For datalog, serial ASCII and digital
displays; one or five places to the right of the decimal may be
selected.
- Common Mode Voltage - 170 VAC RMS channel to ground with optional
high common mode input board. +/-15 maximum with standard input board.
- Dielectric Strength - 1000V power transformer primary to ground:
1000V relay contacts to ground; 1000V power transformer primary to
sensor input terminals.
- Common Mode Rejection Ratio - Better than 120db.
- Input Impedance - Greater than 1 Megohm at DC.
- Normal Mode Rejection Ratio - Better than 45db at 60 Hz; 70db at 1
KHz.
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