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 Model 421 Gaussmeter

 
Gaussmeter Model 421 Product Overview Gaussmeter Model 421 Ordering Information Gaussmeter Model 421 Downloads
General Measurement
Number of inputs: 1

Update rate: 5 rdg/s on display; up to 18 rdg/s with serial interface

Probe compatibility: Standard and custom probes, including Model 420 & 450 probes

Probe features: Linearity Correction, Auto Probe Zero

Measurement features: Autorange, Max Hold, Relative Mode, Filter

Probe connector: 15-pin D style
 
DC Measurement
DC display resolution: 4¾ digits with filter, 3¾ digits without filter
Probe Type Ranges
Resolution
with filter
Resolution
without filter
HST Probe
300 kG
0.01 kG
0.1 kG
30 kG
0.001 kG
0.01 kG
3 kG
0.0001 kG
0.001 kG
300 G
0.01 G
0.1 G
HSE Probe
30 kG
0.001 kG
0.01 kG
3 kG
0.0001 kG
0.001 kG
300 G
0.01 G
0.1 G
30 G
0.001 G
0.01 G
UHS Probe
30 G
0.001 G
0.01 G
3 G
0.0001 G
0.001 G
300 mG
0.01 mG
0.1 mG
DC accuracy: ±0.20% of reading ±0.05% of range

DC temperature coefficient: ±0.05% of reading ±0.03% of range per ºC
 
AC RMS & Peak Measurement
AC display resolution: 3¾ digits
Probe Type Ranges
Resolution
HST Probe
300 kG
0.1 kG
30 kG
0.01 kG
3 kG
0.001 kG
300 G
0.1 G
HSE Probe
30 kG
0.01 kG
3 kG
0.001 kG
300 G
0.1 G
30 G
0.01 G
UHS Probe
30 G
0.01 G
3 G
0.001 G
300 mG
0.1 mG
AC RMS frequency range: 10 Hz to 400 Hz

AC RMS accuracy:
±2% of reading (50 Hz to 60 Hz)

AC RMS frequency response:
0 to -3.5% of reading (10 Hz to 400 Hz)
(All AC specifications for sinusoidal input >1% of range)
Front Panel
Display type: Large 2-line × 20-character, vacuum fluorescent display

Display resolution:
To ±4¾ digits

Display update rate:
5 rdg/s

Display units:
Gauss (G), Telsa (T)

Units multipliers:
µ, m k

Annunciators:
RMS: AC input signal, DC: DC input signal, MAX: Max Hold value, s: Relative reading, R: Remote operation,:Alarm on

Keypad: 12-key membrane

Front panel features: Intutive operation, display prompts, front panel lockout, brightness control
 
Interfaces
RS-232C capabilities
  Baud: 300, 1200, 9600
  Connector: DE-9, DTE configuration
  Software support : LabView™ driver (consult Lake Shore for availability); compatible with Model 420 command set
Alarm
  Settings: High and low set point, Inside/Outside, Audible, Sort
  Actuators: Display annuciator, sort message, beeper, relay
Relay
  Number: 1
  Contacts: Normally open (NO), normally closed (NC) and common (C)
  Contact rating: 30 VDC at 2 A
  Operation: Follows alarm
  Connector: Detachable terminal block
Monitor analog output
  Configuration: Real time analog voltage output
  Range: ±3 V
  Scale: ±3 V = ±FS on selected range
  Frequency response: DC to 400 Hz
  Accuracy: Probe dependent
  Minimum load resistance: 1 kW (short circuit protected)
  Connector: BNC
Corrected analog output
  Configuration: Voltage output generated by DAC
  Range: ±3 V
  Scale: ±3 V = ±FS on selected range
  Resolution: 1.25 mV
  Update rate: 5 updates/s
  Accuracy: ±0.35%
  Minimum load resistance: 1 kW (short circuit protected)
  Connector: BNC
 
General
Ambient temperature: 15 to 35 ºC at rated accuracy; 5 to 40 ºC with reduced accuracy

Power requirement:
100, 120, 220, 240 VAC (+5%, -10%), 50 or 60 Hz, 20 VA

Size: 216 mm W × 89 mm H × 318 mm D (8.5 in × 3.5 in × 12.5 in), half rack

Weight: 3 kg (6.6 lb)

Approval: CE mark
 
 
 
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