Case and Composition
Plastic case.
Color: Black case, white scale plate.
Pointer: Black Knife Edge Pointer.
HST-57N - 4 Stud Surface Mount / HST-57W - Window Mount, No Mounting Studs.

Accuracy:: ±2.0% full scale value.

Hz Meter
Measuring Ranges: 45~56 Hz, 45~55 Hz, 55~65 Hz.
Rated Voltage: 120V, 240V.
Accuracy: ±2.0% full scale.

General:
Relative Humidity: 20% to 80%RH (Nominal Use).
Operating Temperature: 32°F to 104°F (0°C to 40°C).
Storage Temperature: -4°F to 131°F (-20°C to 55°C).
Performance: ANSI C39.1.
Vibration: ANSI C39.1.
Enclosure: IP42 unless otherwise noted.

HST-57W Equivalent to Yokogawa (YCA) Horizon Series 251-1, 255-5

HST-57N Equivalent to Yokogawa (YCA) Stylist Series 260-1

Case and Composition
Plastic case.
Color: Black case, white scale plate.
Pointer: Black Knife Edge Pointer.
HST-57N - 4 Stud Surface Mount / HST-57W - Window Mount, No Mounting Studs.

Accuracy:: ±2.0% full scale value.

Hz Meter
Measuring Ranges: 45~56 Hz, 45~55 Hz, 55~65 Hz.
Rated Voltage: 120V, 240V.
Accuracy: ±2.0% full scale.

General:
Relative Humidity: 20% to 80%RH (Nominal Use).
Operating Temperature: 32°F to 104°F (0°C to 40°C).
Storage Temperature: -4°F to 131°F (-20°C to 55°C).
Performance: ANSI C39.1.
Vibration: ANSI C39.1.
Enclosure: IP42 unless otherwise noted.

HST-57W Equivalent to Yokogawa (YCA) Horizon Series 251-1, 255-5

HST-57N Equivalent to Yokogawa (YCA) Stylist Series 260-1