MODEL: 73VR21

73VR21 SPECIFICATIONS

ES-7395 Rev.29 Page 3/18

https://www.m-system.co.jp/

■ Thermocouple

Input resistance: 900 kΩ minimum

Input type: (PR), K (CA), E (CRC), F (IC), T (CC), B (RH), R, S,

C (WRe 5-26), N, U, L, P (Platinel II)

Burnout sensing

Upscale: ≤ 130 nA

Downscale: ≤ 220 nA

No burnout: ≤ 10 nA

Burnout sensing time

K, E, J, N, L, P (upscale): ≤ 20 seconds

Others: ≤ 10 seconds

■ RTD (3-wire)

Excitation: 1.25 V / (1.25 kΩ + load resistance across the

terminals A – C); 1.00 mA with 10 Ω across A – C;

0.55 mA with 1000 Ω across A – C

Allowable leadwire resistance: 20 Ω per wire

Input type: Pt 100 (JIS ’89), Pt 100 (JIS ’97, IEC), Pt 200, Pt

300, Pt 400, Pt 500, Pt 1000, Pt 50Ω (JIS ’81), JPt 100 (JIS

’89), Ni 100, Ni 120, Ni 508.4Ω, Ni-Fe 604, Cu 10 @ 25°C

Burnout sensing

Upscale or Downscale: ≤ 130 nA

No burnout: ≤ 10 nA

Burnout sensing time: ≤ 10 seconds

■ Trigger Input: Dry contact; detected ON at ≤ 0.8 V

Voltage across the terminals: ≤ 2.5 V

Current across the terminals: ≤ 4.0 mA

LINE NOISE

A/D CONVERSION (sec)

FILTER FREQ.

MEDIUM*

1

SLOW

FAST

100 ms RATE

50 Hz

0.39

0.54

0.27

50/60 Hz*

1

0.37

0.50

0.25

0.095

60 Hz

0.34

0.46

0.23

Multiplied by two (2) for RTD and potentiometer input.

*1. Standard setting

■ ANALOG INPUT UPDATE CYCLE

OUTPUT SPECIFICATIONS

■ Alarm Output: Photo MOSFET relay (no polarity);

≤ 50 Ω at ON, ≥ 1 MΩ at OFF; OFF when not powered

Peak load voltage: 50 V max.

Continuous load current: 50 mA max.

Peak load current: 300 mA max. (≤ 0.1 sec.)

INSTALLATION

Power consumption

•AC:

Approx. 25 VA at 100 V

Approx. 35 VA at 240 V

•DC: Approx. 11 W or 460 mA

Operating temperature: 0 to 50°C (32 to 122°F)

Display quality (e.g. decreased contrast) may deteriorate

when the recorder is used for a long time in an environment

exceeding 50°C. However, it is only a temporary

phenomenon. When the recorder is back in normal

temperature, full legibility is recovered. No damage in

performance.

Operating humidity: 30 to 85 %RH (non-condensing)

Corrosive gas: Not allowed

Mounting: Panel flush mounting (except desktop type)

Panel cutout dimensions: 137 × 137 mm (5.39”× 5.39”)

Weight

73VR2102, 73VR2104, 73VR2106: 2.3 kg (5.1 lb)

73VR2108, 73VR2110, 73VR2112: 2.4 kg (5.3 lb)

Caution: Use of UPS (switching time: without delay, output:

sine waveforms) is recommended to prevent data loss or CF

card damage by a loss of power during recording.

PERFORMANCE

Accuracy: See Tables 1 through 3.

Cold junction compensation error: (°C)

≤ ±[1.0 + |Ambient Temp. – 25| × 0.04]

(in stable ambient temperature; e.g. ±1.4°C at 15°C and

35°C)

Applicable with balanced terminal temperature.

Error will increase by imbalances caused by direct mounting

of the REM3 to the terminals.

Temp. coefficient: See Table 4.

Response time

DC of ±1000 mV or narrower ranges or T/C:

≤ [Sampling Time + 0.3 sec.] (0 – 90 %)

DC of ± 3 V or wider ranges:

≤ [Sampling Time + 0.5 sec.] (0 – 90 %)

RTD: ≤ [Sampling Time + 0.3 sec.] (0 – 90 %)

Calendar clock accuracy: Monthly deviation 3 minutes at

25°C

Insulation resistance: ≥ 100 MΩ with 500 V DC

(input 1 to input 2 to input 3 to input 4 to

input 5 to input 6 to input 7 to input 8 to

input 9 to input 10 to input 11 to input 12 to trigger input to

alarm output to power input or FG)

Peak value including both AC and DC (e.g. 354 V AC with 0

V DC).

Nominal withstand voltage between I/O (analog input,

trigger input and alarm output) and power input is

described 500 V peak. However, as far as FG terminal is

appropriately grounded, no dielectric breakdown will occur

between I/O (with or without grounding) and other terminals

when 2000 V AC is applied between FG and power input.

AC power input: 2000V AC @ 1 minute (power input to FG

or Ethernet) 500 V AC @ 1 minute (FG to Ethernet)

DC power input: 1250 V AC @ 1 minute (power input to FG

or Ethernet) 500 V AC @1 minute (FG to Ethernet)