255-250-AJAJ YOKOGAWA, 255-250-AJAJ Datasheet - Page 32

• Manufacturer Part Number: 255-250-AJAJ
• Description: ANALOG FREQUENCY METER MODEL 255-2 45-65HZ 120V
• Manufacturer: YOKOGAWA

Specifications of 255-250-AJAJ

• Meter Range: 45Hz To 65Hz
• Meter Size/dimensions: 2.5" X 2.5"
• Scale Length: 2.06"
• Meter Function: Frequency

26
DC Ratings
DC VOLTMETERS — ZERO-LEFT, ZERO-
BOTTOM, SELF-CONTAINED, LINEAR-
SCALE 1000 OHMS/VOLT
DC VOLTMETERS — ZERO-CENTER, SELF-
CONTAINED, 2000 OHMS/VOLT
DC VOLTMETERS — ZERO-LEFT, ZERO-
BOTTOM, RATED 0-1 mA, FOR USE WITH
EXTERNAL RESISTORS, RESISTORS NOT
INCLUDED (SEE PAGE 29 FOR RESISTORS)
Features: Completely shielded case. No
special calibration required for panel material
— Dust-tight cases — Stack mounting of
meters is possible with all sides of meter case
flush — Optional bezel and mounting bracket
for 1- or 3-unit stack — Zero regulator
provided in rear of case.
NOTE: Mounting hardware is not included.
Type 185 Edgewise Panel Meters
Rating and
150-0-150 V
15-0-15 V
50-0-50 V
Scale
Bezel and Mounting Assembly
Assembly includes — Bezel mounting bracket(s), bolts, nuts,
washers, speed nuts
100 V
150 V
300 V
500 V
600 V
750 V
10 V
15 V
30 V
50 V
Ohms ±15%
1000 Ohms/volt
2000 Ohms/Volt
2000 Ohms/Volt
2000 Ohms/Volt
Resistance
Terminal
34.4 Ohms
34.4 Ohms
34.4 Ohms
3 Stack Mounted
185 011 MTMT
185 011 NDND
185 011 NLNL
185 011 NTNT
185 011 PKPK
185 011 PZPZ
185 011 RXRX
185 012 NDND
185 012 NTNT
185 012 PZPZ
185 171 FASF
185 171 FASJ
185 171 FASM
Horizontal
Scale
Type 185
Edgewise Panel Meters
Accuracy: DC Meters ±2% of full scale. AC
rectifier type ±3% (60 Hertz sine wave at
25ºC).
Overload: Voltmeter — 50% momentary. 20%
sustained. Ammeter — 900% momentary.
20% sustained.
Scale Data: 53 degrees rotation. Length —
1.785".
185 013 MTMT
185 013 NDND
185 013 NLNL
185 013 NTNT
185 013 PKPK
185 013 PZPZ
185 013 RXRX
185 014 NDND
185 014 NTNT
185 014 PZPZ
185 173 FASF
185 173 FASJ
185 173 FASM
Vertical
Scale
Horizontal Type 185
DC MICROAMMETERS — ZERO-LEFT,
ZERO-BOTTOM, SELF-CONTAINED,
LINEAR-SCALE
DC MICROAMMETERS — ZERO-CENTER,
SELF-CONTAINED
DC MILLIAMMETERS — ZERO-LEFT, ZERO-
BOTTOM, SELF-CONTAINED, LINEAR-
SCALE
500-0-500 µA
50-0-50 µA
For mounting one meter only ..............................
For stack mounting three meters .......................
100 mA
300 mA
500 mA
100 µA
500 µA
10 mA
20 mA
50 mA
50 µA
1 mA
5 mA
Type of Mounting
34.4 Ohms
10.2 Ohms
2200 Ohms
1100 Ohms
1100 Ohms
34.4 Ohms
148 Ohms
5.0 Ohms
2.6 Ohms
1.0 Ohms
0.5 Ohms
0.167 Ohms
0.100 Ohms
Insulation Level: 1800 V
Response Time:
3 seconds (max.) for microammeters;
2 seconds (max.) for all other DC ratings; and
2.5 seconds (max.) for AC ratings.
Overshoot: Maximum of 40%.
Dimensions: See page 39.
Meter with Bezel
Type 185
Vertical
185 111 CYCY
185 111 DRDR
185 111 EMEM
185 112 CYCY
185 112 EMEM
185 111 FAFA
185 111 FXFX
185 111 GZGZ
185 111 HFHF
185 111 HYHY
185 111 JRJR
185 111 KGKG
185 111 KMKM
RMS
Hi-pot.
4149K16G0778
4149K16G0780
185 113 CYCY
185 113 DRDR
185 113 EMEM
185 114 CYCY
185 114 EMEM
185 113 FAFA
185 113 FXFX
185 113 GZGZ
185 113 HFHF
185 113 HYHY
185 113 JRJR
185 113 KGKG
185 113 KMKM
Cat. No.