Osaki Meters
Single-Phase, 120/240V 3-wire & 277V 2-wire
Models 7124-S, 9124-SK1, 7177-S & 9177-SK1
9000 Series Includes remote reading capability

The 7124-S, 9124-SK1, 7177-S and 9177-SK1 make up Osaki's single-phase, 2-wire, current transformer operated, digital watt hour meters. The 7124 and 9124 accurately record all 120V and 240V single-phase power in any installation. The 7177 and 9177 provide metering for 277V single-phase power. In addition, the 9124 and 9177 meters provide remote reading capabilities.

    Features

  • Easy-to-read digital dial
  • Easy Installation
  • Designed for indoor/outdoor applications
  • Meets or exceeds ANSI C-12 standards
  • 25-year warranty
  • Same-day Shipping
  • Toll-free technical support
  • Meets UL 1244 Spec

    Options for 9124-SK1 & 9177-SK1

  • K1 reed switch allows remote reading
Specifications
The Osaki 7124-S, 9124-SK1, 7177-S and 9177-SKI assure exceptional quality and durability in a variety of metering applications. Each meter is made with a cyclometer register of five rollers drawn from aluminum sheet, a register frame of nickel-plated brass, brass gears, and stainless steel shafts. The lightweight aluminum rollers minimize error and variation when loads are light. The single-pole brake magnet is designed with micro adjustment and made of tempered steel for stability against external magnetic fields and short circuits.
Remote Reading Capability
The Osaki KI Reed Switch, a factory-installed option, changes the 7000 series meters (7124-S and 7177-S) to 9000 series (9124-SKI and 9177-SK1) by providing remote reading capability. The KI provides a contact closure output from the meter, which allows kilowatt hour usage to be read electronically. The KI is compatible with most automatic meter reading systems.
Technical Data

Description
Units		 7124-S
0B9WHT		 7177-S
0B09HT
Rated Voltage (Line-to-neutral / Line-to-line) (V) 120/240 277
Test Current (A) 2.5 2.5
Class Desiqnation (Maximum Current) (A) 10 10
Rated Frequency Hz 60 60
Meter Constant rev/kwh 1500 1500
Watt Hour Constant (kh) (wh/rev) 2/3 2/3
Current Transformer Ratio (CTR) 200:5 200:5
Transmitting Impulse Constant (9124 & 91 77 meters) (imp/kwh) 1 1
Gear Ratio to Register (Rq) 750 375
Indication of Register (kwh) 00000 00000
Rotor Speed at 5 Amp Load (rpm) 30 34.6
Torque at 5 Amp Load (g-cm) 6.2 7.1
Rotor Weight (g) 18.0 18.0
Torque to weight ratio (%) 0.34 0.39
Power loss on voltage at Rated Voltage (W) 0.8 0.95
Power Loss on Current Circuit at 5 Amp (W) 0.7 0.7
No Running Under No Load at Overvoltage of Rated Voltage (%) 10 10
Starting Current on % Maximum Current (%) 0.25 0.25
Withstand A/C Voltage for I Minute (V) 2500 2500
Weight of Meter (kg) 1.8 1.8
Accuracy
On .25A to 1 OA Rated Currnet at PF 1.0
On 0.5A to I OA Rated Current at PF 0.5
(%)
(%)
±2.0
±2.0
±2.0
±2.0
Complete Metering system package
Osaki meters are shipped as a complete metering package which includes a rain-proof enclosure, face plate and ANSI-standard current transformer. The enclosure is made of 20-guage steel and painted with beige industrial enamel. The 7124 is available in a single enclosure or two or three gang enclosures. Single enclosure shown.
Enclosure Dimensions
Height Width Depth
Single 8.5" 6.5" 4.5"
Double 8.5" 12.125" 4.5"
3-Gang 8.5" 17.75" 4.5"
120V, 1 phase, 2-wire Connection

Notes:
  1. When using 120 Volts for potential, the meter constant must be doubled. This can be accomplished by either double-wrapping the 120V wire as shown, or using a multiplier of 2 on the meter reading. (USE ONLY ONE OF THESE METHODS)
  2. After installation is complete, check rotation of meter disc (see arrows on meter) If rotation is incorrect, reverse rotation by swapping CT leads 1S and 1L.
CT TYPE Multiplier
200:5
400:5
600:5		 =1
=2
=3
ETL Listed for submetering applications
Caution: For continued protection against fire, replace only with fuse of the specified voltage and current ratings. Fuses must be connected with red wire to line voltage and black wire to energy monitor.
240V, 1 phase, 3-wire Connection

Notes:
  1. Wires are crossed through the CT, each entering from the opposite direction.
  2. Rotation of disc is left-to-right when facing the meter. To "correct" disc rotation, reverse leads from the CT at meter terminals.
  3. The CT dot will not be considered when using this hookup. Phasing of meter is accomplished through disc rotation inspection. (see note 2)
CT TYPE Multiplier
200:5
400:5
600:5		 =1
=2
=3
ETL Listed for submetering applications
Caution: For continued protection against fire, replace only with fuse of the specified voltage and current ratings. Fuses must be connected with red wire to line voltage and black wire to energy monitor.
277V, 1 phase, 2-wire Connection

Notes:
  1. Following installation, check meter disc rotation. (See arrows on meter) If rotation is incorrect, reverse rotation by swapping CT leads 1S and 1L
CT TYPE Multiplier
200:5 (1x1)
400:5 (2x1)
600:5 (3x1)		 =1
=2
=3
ETL Listed for submetering applications
Caution: For continued protection against fire, replace only with fuse of the specified voltage and current ratings. Fuses must be connected with red wire to line voltage and black wire to energy monitor.